Live feed19:38:45·155dINSIDERFilingvia QuantisnowDirector Prins Richard K exercised 4,179 shares at a strike of $16.69 and sold $113,253 worth of shares (4,179 units at $27.10) (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.AMPH· Amphastar Pharmaceuticals Inc.Health CareOriginal source